subtitle
n. /ˈsʌbtaɪtl/ B2
副标题；字幕
A secondary title of a book, or printed translation on screen.
仙境例句
The Mock Turtle's song book was called Beautiful Soup, with a subtitle underneath, Sad Music for Happy Fish.
假海龟的歌集名叫《美味的汤》，下面还有一个副标题：《唱给快乐的鱼听的伤心音乐》。